Spinning frame



C. A. PIERCE SPINNING FRAME Filed June 5, 1921 Fig.1..

' Uurence A.Pierce yWQf v Aflys.

Patented June 19, 1923.

UNITED srares PATENT OFFICE.

CLARENCE A. PIERCE, OF LOWELL, MASSACHUSETTS.

' In the operation of a spinning frame when it becomes necessary to dofithe filled bobbins it is the usual practice for the operator to lowerthe ring rail to the lower limit of its movement which brings thetraveller to a point just above the heel of the bobbin, and when thering rail is in this position and the machine has been brought to restthe filled bobbin is withdrawn from the spindle and an empty bobbinreplaced thereon.

During the operation of lifting a filled bobbin from the spindle thelast one or two turns of yarn about the bobbin will be drawn off theheel end thereof and will be wound about the bare spindle, the yarnfrom. the bobbin being broken at a point between the latter and thespindle after the bobbin has been entirely removed from the spindle.This leaves the yarn which has beendrawn through the traveller woundabout the spindle once or twice so that when the empty bobbin is placedon the spindle the end of the yarn will be confined between the bobbinand spindle and will thus be held so that when the spinning frame isstarted up the yarn will be automatically wound onto the bobbin.

It sometimes happens that when the bob Application filed June 3,

SPINNING FRAME.

1921. Serial N0. 474,665.

the removing of the bobbin from the spindle will cause the yarn to bebroken at some point between the traveller and the drawing rolls andtherefore when a fresh bobbin is replaced on the spindle it becomesnecessary to piece up this broken end.

The object of my invention is to provide an improved stop device forlimiting the downward movement of the ring rail which stop device can beadjusted to allow the ring rail to be carried below theheels of thebobbins when the latter are to be doffed thereby so relativelypositioning the bobbins and ringrail that the latter can be lifted fromthe spindles without danger that the yarn will become caught on the heelof the bobbin thus eliminating danger of broken ends.

In order to give an understanding of the invention I have illustrated inthe drawings a selected embodiment thereof which will now be describedafter which the novel features will be pointed out in the appendedclaims.

Fig. 1 is a portion of a spinning frame embodying my invention.

Fig. 2 is an enlarged section on the line 2 2, Fig. 1 showing myimproved stop.

Fig. 3 is a side view of the stop showing it in the position it occupiesduring the spinning of the yarn and while the bobbin is being filled.

Fig. 4 shows the position of the stop during the doflingof the bobbins.

Fig. 5 is a view showing the two positions of the ring railcorresponding to the .two positions of the stop.

In the drawings 1 indicates a spinning frame of any suitable or usualconstruction, the latter having a plurality of spindles 2 which carrythe usual bobbins 3. 4 indi cates the ring rail carrying aspinning ring5 for each bobbin, each spinning ring having the usual traveller 6. Theringrail is given its rising and falling movement by means of the usualbuilder motion indicated generally at 7 said builder motion beingconnected by the chain 10 to a weighted bell crank lever 8 pivoted tothe frame at 9, said lever acting on a post 11 secured to the mug raill.

There are usually several of these bell crank levers which are connectedtogether by a connection or rod 12.

The parts thus far described are, or may be, all as usual in spinningframes and form no part of my present invention and as their operationis well known to those skilled in the art it is not necessary to furtherdescribe them.

The bell crank lever S is usually provided with a suitable stop adaptedto engage the portion 13 of the frame, (which portion is usuallyreferred to as a samson) forwthe purpose of limiting the downwardmovement of the ring rail, this stop being so adjusted as to prevent thering rail from being lowered to a point where the yarn will be wound onthe heel of the bobbin. In fact the stop is usually adjusted so that thering rail cannot be'lowered below the point indicated by full lines Fig.5.

ll l i e lOOblOiIIS are filled and are ready to betlofied the operatorlowers the ring rail as far as the stop will permit which,

.in spinning'machines now commonly used,

will bring the ring rail intopthe' position shown infull lines Fig. .5.Vl hen the machine isat -rest thefoyperator then lifts the bobbin fromthe i'spindle and in doing this the l'ast turn or two of yarnindicated'at :14 in Fig. 5 will be drawn off from the heel end of thebobbin and will naturally as sume a position making one or two turnsabout the bare spindle." WVhen the bobbin has been entirely removed fromthe spin- .dle, then a fresh bobbin is placed on the spindle andthisjoperation breaks the yarn between the spindle and the filledbobbin, and at the same time the end of the yarn which is wound aboutthe spindle will be confined between the fresh bobbin and the spindle.

Asstated above it sometimes happens that in removing the filled bobbinfrom the spindle the 'last turn or two of yarn on the bobbin indicatedat 1 1, Fig. 5, will become caught on the shoulder 15 of the bobbinheel, thus preventingthe yarn from being pulled off from the bobbin, inwhich case.

thelength offyarn necessary to permit the bobbin to be removed from thespindle will be drawn through the traveler 6.

'This drawing of the yarn through the traveller will cause the-yarn tobreak at Some point between the traveller and the drawing rolls,thusqproducing a broken end wh1e11 requ1res to be pieced when the spin-vning-;fr:-1me is started again. 1

lhave provided herein a stop which normally prevents the'ri'ng rail frommoving downwardly any further than the full line 1 .p osition Fig. 4 andwhich therefore func t-ions during the spinning operation. as theordinary stop, but which may be adjusted to permit the ring rail to bedepressed into vice therefore which enables the ring rail to i bedepressed into the dotted line position during dotting, it is possibleto doff the bobing any broken ends.

The stop device comprises an arm '16 which is fast on the rod 12 and isshaped to .engage the samson 13'when the connection 12 moves to theleft. The end 17 of this arm ispivotally connected to the body thereofas shown a t'18 so that it can be swung into or out of operativeposition. The pivotal connection is in the form of a kunclele joint,that is, the pivoted end 17 of the meinbei' 'is provided with a squareface 19 which F is adapted to engage the square face 20 of the arm 16when the member 171s in line with the arm 16, said squareface19-limiting the swinging movement of the end 17 in one dibinsquickly and without danger of producre'ction. When the part 17 isadjusted into the position shown in Fig. 3 the stop will co-operate'withthe samson 13 (to limit the downward movement of the ring rail when thelatter reaches the full line position Fig. 5. lVhen, however, the part17 pbf the stop is swung into the position shown in Fig. a, then thering rail will be perinitted to be further depressed into, the dottedlinefposition Fig. 5. When the spinning frame is running the stopwil-lbe' in the position shown in Fig. 3 and when it is time .to doffthe bobbinslthe stop will be adjusted'into the position shown in Fig; 41so that when the'ring rail, is depressed it may be carried intothedotted line position Fig. 5. The bobbins are then dofl'ed while therail is in the dotted line position and as stated above this operationcan be: carried ployed. I have herein shown the part 17 as having apivot pin 18 rigid therewith, said pivot pin being loosely mountedin'the arm 16 and being extended laterally toward the front of thespinning frame as shown at 21', the end ofthe extension being be'nt asshown at 22 to form a-handle by "which the part ,1? may be turnedabout-its pivot.

While 1. have illustrated herein one embodiment of my invention I do notwish to be limited to the constructional features shown.

I claim:

1. In a spinning frame, the combination with spindles adapted to supportbobbins, of a ring rail carrying spinning rings, a stop device having apivoted stop arm which in one position is operative to limit theclownward movement of the ring rail during the spinning operation and inanother position permits the ring rail to drop lower during the doffingof the bobbins.

2. In a spinning frame, the combination with spindles adapted to supportbobbins, of a ring rail carrying spinning rings, a stop device having anadjustable stop arm, said stop arm when in one position being operativeto limit the downward movement of the ring rail and in another positionbeing inoperative for this purpose.

3. In a spinning frame, the combination with a frame having a samson, ofspindles carried thereby, bobbins on the spindles, a

ring rail, spinning rings on the ring rail, and a stop to engage thesamson and limit the downward movement of the ring rail during spinningoperation, said stop being adjustable to permit the ring rail to have afurther downward movement during dofling of the bobbin.

4. In a spinning frame, the combination with a frame having a samson, ofspindles carried by the frame, bobbins on the spindles, a ring rail,spinning rings on the ring rail, a bell crank lever associated with thering rail, a stop arm connected to said lever and adapted to engage theSamson to limit the downward movement of the ring rail, the end of thestop arm being pivoted so that it may be into or out of operativeposition and when out of operative position permitting the ring rail todrop below the heels of the bobbins.

In testimony whereof, I have signed my name to this specification.

CLARENCE A. PIERCE.

